<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
        //new 关键字执行过程
        //1.new 构造函数可以再内存中创建了一个空的对象
        //2.this就会指向刚才创建的空对象
        //3.执行构造函数里面的代码 给这个空对象添加属性和方法
        //4.返回这个对象

        function Star(uname,age,sex) {
            this.name = uname;
            this.age = age;
            this.sex = sex;
            this.sing = function (song) {
                console.log(song);
            }
        }

        var ldh = new Star('刘德华',18,'男');

    </script>
</head>
<body>

</body>
</html>